The district leans heavily Democratic — about 43 percent of those who have registered to vote are Democrats, compared with about 18 percent who are Republicans. Most of the rest are unaffiliated.

The 4th District was split until the 2011 election, when its Republican assemblyman was redistricted into the neighboring 3rd District. It has been solidly blue ever since.

All three of the current Democratic representatives are seeking re-election: Sen. Fred Madden of Sewell, and Assembly members Paul Moriarty of Sewell and Gabriela Mosquera of Blackwood.

The Secretary of State’s official candidates’ list shows no opposition for Madden. Patricia Jefferson Kline of Sicklerville and Eduardo J. Maldonado of Winslow are the Republicans running for Assembly.

There is also an independent, William McCauley Jr. of Blackwood, running under the slogan “Represent, Not Rule.”